Abstract
Pure and M-doped Co3O4 (M = Cr, Fe, Mg, Zr) powders with a nanometre size and a narrow size distribution were prepared by spray pyrolysis from a spray solution with citric acid and ethylene glycol. The precursor powders with a hollow and thin walled structure were turned to nano-sized Co3O4 powders after post-treatment. The mean size of the pure Co3O4 powders post-treated at a temperature of 600°C was 77 nm. On the other hand, the mean sizes of the doped Co3O4 powders with a doping concentration of 3 mol.% were changed from 24 to 63 nm. The Mg-doped Co3O4 powders had the minimum mean size. The mean sizes of the Mg-doped Co3O4 powders with doping concentrations of 1 and 5 mol.% were 60 and 61 nm. The mean sizes of the Mg-doped Co3O4 powders with a doping concentration of 3 mol.% post-treated at temperatures of 700 and 800°C were 63 to 102 nm.
Original language | English |
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Pages (from-to) | 527-532 |
Number of pages | 6 |
Journal | Journal of Ceramic Processing Research |
Volume | 11 |
Issue number | 5 |
Publication status | Published - 2010 |
Externally published | Yes |
Keywords
- Black matrix
- Cobalt oxide
- Display material
- Gas phase reaction
- Nano powders
- Spray pyrolysis
ASJC Scopus subject areas
- Ceramics and Composites